Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a média do rank 1?
 ###Tabelas: CREATE TABLE other_stakes_with_congregations_in_arkansas (other_stakes_with_congregations_in_arkansas_id AUTO_INCREMENT PRIMARY KEY, Stake VARCHAR, Organized VARCHAR, Number of Wards/ Branches in Arkansas INT, Stake President VARCHAR, Occupation VARCHAR) CREATE TABLE list_of_deputy_prime_ministers_of_spain (list_of_deputy_prime_ministers_of_spain_id AUTO_INCREMENT PRIMARY KEY, Deputy Prime Minister VARCHAR, Took office INT, Left office VARCHAR, Prime Minister VARCHAR, Term VARCHAR, Party VARCHAR) CREATE TABLE relegation_playoffs (relegation_playoffs_id AUTO_INCREMENT PRIMARY KEY, Team 1 VARCHAR, Agg. VARCHAR, Team 2 VARCHAR, 1st leg VARCHAR, 2nd leg VARCHAR) CREATE TABLE top_ten_scorers (top_ten_scorers_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Hometown VARCHAR, Games VARCHAR, Goals VARCHAR, Assists VARCHAR, Points VARCHAR, Pen. Min. VARCHAR) CREATE TABLE most_career_wickets (most_career_wickets_id AUTO_INCREMENT PRIMARY KEY, Rank VARCHAR, s Wicket VARCHAR, Player VARCHAR, Matches VARCHAR, Average VARCHAR)  
SELECT Average FROM most_career_wickets WHERE Rank = 1